Occurrence of
scent glands and related structures in prosimians, including the Malagasy
lemurs. Names of glands occurring in lorisidae are written in black, glands
only found in Malagasy lemurs in grey. In the Asian lorises, an optically
inconspicuous, but large brachial organ and other glands, particularly
in the genital region, occur. The African lorises have got conspicuous
glandular areas in the genital region instead (scrotal skin, pseudoscrotum
in female pottos). Based on Schilling (1979), Rasmussen and Nekaris (1998)
and other sources.

Position of mammae in a

hypothetical small mammal

(redrawn, changed,

from Ansell, 1965)

Number
and location of mammae: Ansell (1965) recommends routine recording
of the number of mammae for taxonomic purposes in lower primates and other
groups. The number may be constant over a whole mammal order or vary considerably.
Jenkins (1987), quoting several authors, mentions 2-8 mammae in Loris:
one pectoral pair to two pectoral and two abdominal pairs. At Ruhr-University,
all lactating Loris fermales had two well visible (functional) pairs
of pectoral mammae. Only parous females can usually be used for determination;
some mammae may be non-functional and inconspicuous. Proposition for a
notation as a mammary formula (Ansell 1965): 1-0-2=6 means 1 pair of pectoral
mammae, no abdominal ones, two inguinal pairs.